AutoCodes – Chevrolet – P0848 2018 Chevrolet Silverado

P0848 2018 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 2 Circuit High Voltage

Quick Answer

The transmission fluid pressure switch, also known as the pressure switch manifold, is a multiple switch assembly made up of 3 normally open pressure switches and 1 normally closed pressure switch. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0848 2018 Chevrolet Silverado indicates Transmission Fluid Pressure Switch 2 Circuit High Voltage.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 252

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Aug 02, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0848 2018 Chevrolet Silverado Description

The transmission fluid pressure switch, also known as the pressure switch manifold, is a multiple switch assembly made up of 3 normally open pressure switches and 1 normally closed pressure switch. Pressure switch 1 monitors shift valve 1 positioning, pressure switch 2 monitors shift valve 2 positioning, pressure switch 3 monitors shift valve 3 positioning, and pressure switch 4 monitors the position of the manual selector valve. The TCM provides a signal circuit to each of the pressure switches. The TCM constantly monitors the circuits to determine the position of the shift valves. The position of shift valves 1, 2, and 3 is controlled by 3 normally closed shift solenoids. When energized, shift solenoid 1 directs fluid pressure to shift valve 1, shift solenoid 2 directs fluid pressure to shift valve 2, and shift solenoid 3 directs fluid pressure to shift valve 3, which strokes the shift valves. When a shift valve is stroked, an exhaust passage is blocked and fluid pressure increases, closing the normally open pressure switch. The Diagnostic Trouble Code (DTC) will be set when the TCM detects that transmission fluid pressure switch 2 signal circuit is High when shift solenoid 2 is commanded ON for 1 s.

OBDII Code P0848 2018 Chevrolet Silverado - Transmission Fluid Pressure Switch 2 Circuit High Voltage - AutoCodes.com — P0848 2018 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 2 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0848 2018 Chevrolet Silverado?

Low transmission fluid level
Dirty transmission fluid
Faulty Transmission Control Solenoid Valve Assembly
Transmission Control Solenoid Valve Assembly harness is open or shorted
Transmission Control Solenoid Valve Assembly circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC P0848 2018 Chevrolet Silverado?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0848 2018 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0848 2018 Chevrolet Silverado code?

Need more information on how to fix the P0848 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0848 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0848 2018 Chevrolet Silverado Code

1. What does the OBDII code P0848 mean on a 2018 Chevrolet Silverado?

The P0848 code indicates a high voltage issue in the Transmission Fluid Pressure Switch 2 Circuit, which monitors hydraulic pressure in the transmission.

2. What are the common symptoms of code P0848 in a 2018 Chevrolet Silverado?

Symptoms may include harsh or delayed shifting, transmission slipping, poor fuel economy, and activation of the Check Engine Light.

3. What causes the P0848 code to appear on a 2018 Chevrolet Silverado?

Common causes include a faulty transmission fluid pressure switch, damaged wiring or connectors in the circuit, low or contaminated transmission fluid, or a malfunctioning transmission control module (TCM).

4. Can I drive my 2018 Chevrolet Silverado with a P0848 code?

Driving with a P0848 code is not recommended, as it may lead to transmission damage or unsafe driving conditions due to shifting issues.

5. How do I diagnose the P0848 code in my 2018 Chevrolet Silverado?

Diagnosis involves checking the transmission fluid level and condition, inspecting the wiring and connectors for damage, and testing the transmission fluid pressure switch with a multimeter.

6. How can I fix the P0848 code on my 2018 Chevrolet Silverado?

Repairs may include replacing the faulty transmission fluid pressure switch, repairing or replacing damaged wiring or connectors, or flushing and refilling the transmission fluid.

7. Is a faulty transmission fluid pressure switch the only cause of the P0848 code?

No, other causes include wiring issues, a malfunctioning TCM, or dirty or low transmission fluid.

8. How much does it cost to fix the P0848 code on a 2018 Chevrolet Silverado?

Repair costs vary but can range from $150 to $400 for parts and labor, depending on whether the transmission fluid pressure switch or wiring needs replacement.

9. Can low transmission fluid trigger the P0848 code in a 2018 Chevrolet Silverado?

Yes, low or contaminated transmission fluid can affect hydraulic pressure and trigger the P0848 code.

10. Do I need a professional to fix the P0848 code on my 2018 Chevrolet Silverado?

While some issues, like checking fluid levels, can be addressed by the owner, diagnosing and repairing electrical components or the transmission may require professional expertise.